rec_control man section


rec_control – control pdns_recursor


rec_control [–help] [–socket-dir] [–socket-pid] command ..


rec_control(1) allows the operator to control a running instance of the pdns_recursor.

The commands that can be passed to the recursor are described on


To stop the recursor by hand, run:

# rec_control quit

To dump the cache to disk, execute:

# rec_control dump-cache /tmp/the-cache



provide this helpful message


Where the controlsocket will live


When running in SMP mode, pid of pdns_recursor to control


dump-cache filename

Dumps the entire cache to the filename mentioned. This file should not exist already, PowerDNS will refuse to overwrite it. While dumping, the recursor will not answer questions.

get statistic

Retrieve a statistic. For items that can be queried, see


Check if server is alive.


Request shutdown of the recursor


Reload authoritative and forward zones. Retains current configuration in case of errors.


Shows the top-20 most active remote hosts. Statistics are over the last remotes-ringbuffer-entries queries, which defaults to 0.

wipe-cache domain0 [domain1]

Wipe entries from the cache. This is useful if, for example, an important server has a new IP address, but the TTL has not yet expired. Multiple domain names can be passed. Note that you must terminate a domain with a .! So to wipe, issue rec_control wipe-cache Versions beyond 3.1 don't need the trailing dot. Consider not only wiping but also, as the cached nameservers or target of CNAME may continue to be undesired.


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